There are errors related to ModSecurity. I was attempting to run ModSecurity, but had trouble with the default modsec config vile locations. I thought I had it fixed, but the cpanel update must have created a duplicate config file resulting in some errors. We had several messages like this:

Code:

[2017-02-22 00:05:52 -0700] [27621] ModSecurity: Found another rule with the same id
[2017-02-22 00:05:52 -0700] [27621] AH00526: Syntax error on line 22 of /etc/apache2/conf.d/modsec_vendor_configs/comodo_apache/00_Init_Initialization.conf:
[2017-02-22 00:05:52 -0700] [27621] ModSecurity: Found another rule with the same id
[2017-02-22 00:05:52 -0700] [27621] Can't use string ("Unable to detect Apache version "...) as a HASH ref while "strict refs" in use at /usr/local/cpanel/Cpanel/AdvConfig.pm line 68.

We had to disable ModSecurity to get Apache back up.

Only other error messages that aren't like those are these:

Code:

[2017-02-22 00:06:40 -0700] [27621] (XID c9sb3e) The system failed to set the user ID to “501” and the group ID to “99” on “/home/npl/public_html/addons_sub/form” because of an error: Operation not permitted at /usr/local/cpanel/scripts/enablefileprotect line 101.
[2017-02-22 00:06:40 -0700] [27621] (XID 7rqw6e) The system failed to set the permissions on “/home/npl/public_html/addons_sub/form” to “0750” (as EUID: 501, EGID: 99 99) because of the following error: Operation not permitted at /usr/local/cpanel/scripts/enablefileprotect line 101.